Journal ArticleDOI
Asphalt aging: dual oxidation mechanism and its interrelationships with asphalt composition and oxidative age hardening
J. C Petersen,P. M Harnsberger +1 more
Reads0
Chats0
TLDR
In this paper, a dual mechanism was proposed to explain the hyperbolic-like, time-versus-property plots characteristic of asphalt oxidative aging, and the oxidation kinetics provided further confirmation of the asphalt microstructural model.Abstract:
The kinetic data and chemistry of asphalt oxidative age hardening suggested a sequential, dual mechanism for asphalt oxidation. The dual mechanism rationalizes conflicts between earlier mechanistic investigations and explains the hyperbolic-like, time-versus-property plots characteristic of asphalt oxidative aging. The oxidation kinetics provide further confirmation of the asphalt microstructural model. It is proposed that the rapid initial oxidation rate of asphalt results from reaction of oxygen with limited amounts of highly reactive hydrocarbons. Final oxidation products of this initial reaction are sulfoxides and, most likely, ring aromatization. During this initial reaction, a slower oxidation reaction of asphalt benzylic carbons is initiated; final products are ketones and sulfoxides. The ratio of ketones to sulfoxides formed and the rate of age hardening were found to be dependent on temperature and oxygen pressure. Low-temperature oxidative aging, as occurs in pavements, was found significantly m...read more
Citations
More filters
Journal Article
A Review of the Fundamentals of Asphalt Oxidation: Chemical, Physicochemical, Physical Property, and Durability Relationships
TL;DR: In this paper, a summary of current physicochemical understanding of the chemistry, kinetics, and mechanisms of asphalt oxidation and its influence on asphalt durability is presented, focusing on how the component fractions of asphalt behave under oxidation, including the effects of the mineral aggregate and metals contained in asphalts.
Journal ArticleDOI
Molecular dynamics study of oxidative aging effect on asphalt binder properties
Guangji Xu,Hao Wang +1 more
TL;DR: In this article, the aging effect of asphalt binder was investigated using molecular dynamics simulation in terms of thermodynamic properties such as density, surface energy, viscosity, and cohesive energy density.
Journal ArticleDOI
Asphalt Oxidation Mechanisms and the Role of Oxidation Products on Age Hardening Revisited
J. Claine Petersen,Ronald Glaser +1 more
TL;DR: In this paper, it was shown that the alcohols, which are formed concurrently with the sulfoxides from the same hydroperoxide precursors as the ketones, have a similar effect on asphalt viscosity increase as does the ketone.
Journal ArticleDOI
Field aging effect on chemistry and rheology of asphalt binders and rheological predictions for field aging
TL;DR: In this article, the authors investigate the field aging effect on binder rheology and structure and establish the structure-rheological property relationships with the ultimate goal of predicting rheological properties of field aged binders.
Journal Article
Testing Protocols to Ensure Performance of High Asphalt Binder Replacement Mixes Using RAP and RAS
Imad L. Al-Qadi,Hasan Ozer,John Lambros,Ahmad El Khatib,Punit Singhvi,Tamim Khan,Jose Rivera-Perez,Berangere Doll +7 more
TL;DR: In this paper, the authors developed and evaluated protocols, procedures, and specifications for testing engineering properties and performance of AC mixtures with high amounts (up to 60%) of reclaimed asphalt pavement (RAP) and recycled asphalt shingles (RAS) in asphalt concrete mixtures.
References
More filters
Book ChapterDOI
Chapter 14 Chemical Composition of Asphalt as Related to Asphalt Durability
TL;DR: In this paper, the authors examined the literature dealing with the chemical composition of asphalt and changes in composition during environmental aging that affect durability-related properties, and the characterization of the chemical functional types gave a fundamental approach to the relationships between asphalt composition and asphalt properties.
Journal Article
Chemical composition of asphalt as related to asphalt durability: state of the art
TL;DR: The literature on asphalt chemical composition and asphalt durability has been reviewed and interpreted relative to the current state-of-the-art as mentioned in this paper, and two major chemical factors affecting asphalt durability are the compatibility of the interacting components of asphalt and the resistance of the asphalt to change from oxidative aging.
Journal ArticleDOI
The kinetics of carbonyl formation in asphalt
TL;DR: In this paper, the low-temperature oxidation kinetics of 14 asphalts are presented, showing that asphalt oxidation occurs in two stages: (1) a relatively rapid-rate period, followed by a long period of constant rate.
Journal ArticleDOI
A dual, sequential mechanism for the oxidation of petroleum asphalts
TL;DR: In this article, a sequential, dual mechanism for asphalt oxidation was proposed to explain the hyperbolic-like, property-versus-time plots characteristic of asphalt oxidative aging.
Journal Article
Quantitative functional group analysis of asphalts using differential infrared spectrometry and selective chemical reactions--theory and application
TL;DR: In this paper, an analytical method is described for the rapid quantitative analysis of seven highly polar chemical functional groups present in asphalt or formed in asphalt during oxidative aging, which is applicable to composition-related problems in asphalt technology.
Related Papers (5)
Asphalt Oxidation Mechanisms and the Role of Oxidation Products on Age Hardening Revisited
J. Claine Petersen,Ronald Glaser +1 more